:root {
  --bg: #f4f6fb;
  --bg-card: #ffffff;
  --bg-subtle: #eef2f9;
  --bg-inset: #f8fafd;
  --text: #172033;
  --text-soft: #4b5872;
  --muted: #74829c;
  --border: #dde4f0;
  --border-strong: #c8d3e6;
  --primary: #2f6bed;
  --primary-strong: #1f55cc;
  --primary-soft: #e8f0ff;
  --green: #138a53;
  --green-soft: #e3f6ec;
  --amber: #9a6700;
  --amber-soft: #fff6df;
  --red: #c22a2a;
  --red-soft: #fdecec;
  --violet: #6941c6;
  --shadow: 0 1px 2px rgba(23, 32, 51, 0.06), 0 8px 24px rgba(23, 32, 51, 0.06);
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1420;
    --bg-card: #161e2d;
    --bg-subtle: #1c2637;
    --bg-inset: #111a28;
    --text: #e7edf8;
    --text-soft: #b3c1d8;
    --muted: #8595b0;
    --border: #263248;
    --border-strong: #34425c;
    --primary: #5a8cff;
    --primary-strong: #7aa2ff;
    --primary-soft: #1b2a4a;
    --green: #3dd68c;
    --green-soft: #14291f;
    --amber: #f0bd4f;
    --amber-soft: #2c2413;
    --red: #ff7b72;
    --red-soft: #34191a;
    --violet: #b392f0;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 8px 24px rgba(0, 0, 0, 0.25);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background:
    radial-gradient(1200px 400px at 15% -10%, rgba(47, 107, 237, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 14px;
  line-height: 1.55;
  min-height: 100vh;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
}

h1 {
  font-size: 18px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 15px;
}

p {
  margin: 0;
}

ul,
dl {
  margin: 0;
  padding: 0;
  list-style: none;
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--bg-subtle);
  padding: 1px 5px;
  border-radius: 5px;
}

[hidden] {
  display: none !important;
}

.mono {
  font-family: var(--mono);
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 12.5px;
}

.tiny {
  font-size: 12px;
}

/* ---------- header ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--bg-card) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--primary), var(--primary-strong));
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.5px;
  font-size: 15px;
}

.brand-sub {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.header-self {
  color: var(--muted);
  font-size: 12.5px;
  font-family: var(--mono);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  gap: 8px;
}

/* ---------- buttons / pills ---------- */
.btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  border-radius: 9px;
  padding: 8px 14px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  white-space: nowrap;
}

.btn:hover {
  background: var(--bg-subtle);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(150deg, var(--primary), var(--primary-strong));
  border-color: transparent;
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(150deg, var(--primary-strong), var(--primary-strong));
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
}

.btn-danger-ghost {
  color: var(--red);
  border-color: color-mix(in srgb, var(--red) 35%, var(--border));
}

.btn-small {
  padding: 4px 10px;
  font-size: 12.5px;
  border-radius: 7px;
}

.btn-block {
  width: 100%;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-soft);
}

.pill .dot,
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}

.pill[data-state="ONLINE_WSS"] {
  color: var(--green);
  background: var(--green-soft);
  border-color: color-mix(in srgb, var(--green) 30%, transparent);
}

.pill[data-state="ONLINE_HTTP"] {
  color: var(--amber);
  background: var(--amber-soft);
  border-color: color-mix(in srgb, var(--amber) 35%, transparent);
}

.pill[data-state="CONNECTING"],
.pill[data-state="RECONNECTING"] {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 30%, transparent);
}

.pill[data-state="WAIT_NETWORK"] {
  color: var(--muted);
}

.pill[data-state="AUTH_REQUIRED"],
.pill[data-state="REVOKED"] {
  color: var(--red);
  background: var(--red-soft);
  border-color: color-mix(in srgb, var(--red) 32%, transparent);
}

.pill[data-state="STOPPED"] {
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-soft);
}

.badge-green {
  color: var(--green);
  background: var(--green-soft);
  border-color: transparent;
}

.badge-red {
  color: var(--red);
  background: var(--red-soft);
  border-color: transparent;
}

.badge-amber {
  color: var(--amber);
  background: var(--amber-soft);
  border-color: transparent;
}

.badge-blue {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: transparent;
}

/* ---------- layout / cards ---------- */
main {
  padding: 20px 24px 48px;
  max-width: 1500px;
  margin: 0 auto;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.card-head-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.view {
  animation: fade-in 0.18s ease;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(3px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.loading-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 80px 0;
}

.spinner {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- alerts & toasts ---------- */
.alert-host {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0 24px;
  max-width: 1500px;
  margin: 14px auto 0;
}

.alert-host:empty {
  padding: 0;
}

.banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 13px;
}

.banner-warn {
  background: var(--amber-soft);
  border-color: color-mix(in srgb, var(--amber) 30%, transparent);
}

.banner-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
}

.banner-body > span {
  overflow-wrap: anywhere;
}

/* R1：deliveryId 在消息卡片上的等宽小徽标。 */
.badge-mono,
.delivery-id {
  font-family: var(--mono);
  font-weight: 500;
}

.badge-mono {
  font-size: 11px;
  padding: 1px 6px;
}

.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  padding: 10px 14px;
  box-shadow: var(--shadow);
}

.alert .alert-body {
  flex: 1;
  min-width: 0;
}

.alert .alert-title {
  font-weight: 700;
  display: block;
}

.alert .alert-text {
  color: var(--text-soft);
  font-size: 12.5px;
  overflow-wrap: anywhere;
}

.alert-error {
  border-color: color-mix(in srgb, var(--red) 40%, var(--border));
  background: var(--red-soft);
}

.alert-warn {
  border-color: color-mix(in srgb, var(--amber) 40%, var(--border));
  background: var(--amber-soft);
}

.alert-info {
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
  background: var(--primary-soft);
}

.alert-close {
  border: none;
  background: transparent;
  color: inherit;
  font-size: 16px;
  cursor: pointer;
  opacity: 0.7;
  padding: 0 2px;
}

.toasts {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 380px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: 9px;
  box-shadow: var(--shadow);
  padding: 10px 14px;
  font-size: 13px;
  animation: toast-in 0.18s ease;
  overflow-wrap: anywhere;
}

.toast-error {
  border-left-color: var(--red);
}

.toast-success {
  border-left-color: var(--green);
}

.toast-warn {
  border-left-color: var(--amber);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- onboarding ---------- */
.onboarding {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.hero h2 {
  margin: 4px 0 8px;
}

.hero p {
  max-width: 720px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 11.5px;
  font-weight: 800;
  color: var(--primary);
}

.hero-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  font-weight: 600;
}

.onboarding-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 16px;
  align-items: start;
}

@media (max-width: 900px) {
  .onboarding-grid {
    grid-template-columns: 1fr;
  }
}

.endpoints-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0 6px;
}

.endpoint-row {
  display: grid;
  grid-template-columns: 1fr 84px auto;
  gap: 8px;
  align-items: center;
}

.endpoint-row input[type="text"],
.endpoint-row input[type="number"] {
  width: 100%;
}

input,
select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg-inset);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
  outline: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent);
}

textarea {
  resize: vertical;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.5;
}

.tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 14px;
}

.tab {
  flex: 1;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-soft);
  font: inherit;
  font-weight: 700;
  border-radius: 7px;
  padding: 7px 10px;
  cursor: pointer;
}

.tab.is-active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: var(--shadow);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 12px;
}

.field-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-soft);
}

.form-error {
  color: var(--red);
  font-size: 12.5px;
  background: var(--red-soft);
  border-radius: 7px;
  padding: 7px 10px;
  margin-bottom: 12px;
  overflow-wrap: anywhere;
}

.join-status {
  border: 1px dashed var(--border-strong);
  border-radius: 10px;
  padding: 14px;
  margin-top: 14px;
  background: var(--bg-inset);
}

.status-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  margin-bottom: 12px;
}

.dot-pending {
  background: var(--amber);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  50% {
    opacity: 0.35;
  }
}

.inline-copy {
  display: flex;
  gap: 8px;
  align-items: center;
}

.inline-copy input {
  flex: 1;
  font-family: var(--mono);
  font-size: 12.5px;
}

.advanced-card summary {
  font-weight: 700;
  cursor: pointer;
}

.advanced-card ul {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-left: 18px;
  list-style: disc;
}

/* ---------- main view ---------- */
.main-view {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.conn-bar {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  padding: 12px 16px;
}

@media (max-width: 1200px) {
  .conn-bar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .conn-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.conn-item {
  min-width: 0;
}

.conn-item-wide {
  grid-column: span 2;
}

.conn-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 700;
}

.conn-value {
  display: block;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.main-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) 300px;
  gap: 14px;
  align-items: start;
}

@media (max-width: 1280px) {
  .main-grid {
    grid-template-columns: 300px minmax(0, 1fr);
  }
  .col-right {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
}

@media (max-width: 860px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
  .col-right {
    grid-template-columns: 1fr;
  }
}

.col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.mini-details {
  margin-top: 8px;
  font-size: 12.5px;
}

.mini-details summary {
  cursor: pointer;
  color: var(--muted);
}

.inline-form {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 8px;
}

.inline-form .grow,
.inline-form input {
  flex: 1;
  min-width: 0;
}

/* 选择框默认 width:100%，在 inline-form 中需要按内容定宽，否则会挤掉其他控件 */
.inline-form select {
  width: auto;
  flex: 0 1 auto;
}

.inline-form select.grow {
  flex: 1 1 120px;
  min-width: 0;
}

#invite-ttl {
  flex: 0 0 104px;
}

.invite-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.invite-controls > select {
  width: 100%;
}

.invite-controls .inline-form {
  margin-top: 0;
}

.invite-controls .inline-form button {
  flex: none;
}

.empty {
  padding: 10px 2px;
  font-size: 12.5px;
  font-style: italic;
}

/* devices */
.device-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.device-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg-inset);
}

.device-row.is-self {
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  background: var(--primary-soft);
}

.device-row.is-revoked {
  opacity: 0.6;
}

.presence-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
  background: var(--muted);
}

.presence-dot.online {
  background: var(--green);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--green) 22%, transparent);
}

.device-main {
  flex: 1;
  min-width: 0;
}

.device-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.device-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--muted);
  flex-wrap: wrap;
}

.device-id {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

/* groups */
.group-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.group-card {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 9px 10px;
  background: var(--bg-inset);
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.group-card:hover {
  border-color: var(--border-strong);
}

.group-card.is-active {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.group-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-weight: 700;
  font-size: 13px;
}

.group-members {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.member-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-soft);
}

.member-chip .presence-dot {
  width: 6px;
  height: 6px;
}

.member-chip .role {
  color: var(--violet);
  font-weight: 700;
}

/* invites */
.invite-result {
  margin-top: 10px;
  border: 1px dashed var(--border-strong);
  border-radius: 9px;
  padding: 10px;
  background: var(--bg-inset);
}

.secret-code {
  flex: 1;
  overflow-wrap: anywhere;
  font-size: 12px;
  padding: 6px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
}

/* timeline */
.timeline-card {
  min-height: 320px;
  display: flex;
  flex-direction: column;
}

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 520px;
  overflow-y: auto;
  padding-right: 2px;
}

.message-row {
  border: 1px solid var(--border);
  border-left: 4px solid var(--border-strong);
  border-radius: 9px;
  background: var(--bg-inset);
  padding: 9px 11px;
  font-size: 13px;
}

.message-row.out {
  border-left-color: var(--primary);
}

.message-row.in {
  border-left-color: var(--green);
}

.message-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.message-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 12.5px;
  flex-wrap: wrap;
}

.message-time {
  font-size: 11.5px;
  color: var(--muted);
  font-family: var(--mono);
}

.message-payload {
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-soft);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 6px 8px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 160px;
  overflow: auto;
}

.message-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 7px;
}

.ack-chips {
  display: inline-flex;
  gap: 4px;
  flex-wrap: wrap;
}

.ack-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 10.5px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg-card);
}

.ack-chip.on {
  color: var(--green);
  background: var(--green-soft);
  border-color: transparent;
}

.ack-chip.pending {
  color: var(--amber);
  background: var(--amber-soft);
  border-color: transparent;
}

.recipient-line {
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.recipient-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.error-text {
  color: var(--red);
  font-size: 12px;
  margin-top: 4px;
  overflow-wrap: anywhere;
}

/* send */
.send-card {
  position: relative;
}

.send-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 12px;
}

.field-full {
  grid-column: 1 / -1;
}

@media (max-width: 640px) {
  .send-grid {
    grid-template-columns: 1fr;
  }
}

.segmented {
  display: flex;
  gap: 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
}

.segmented-btn {
  flex: 1;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-soft);
  font: inherit;
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 8px;
  border-radius: 6px;
  cursor: pointer;
}

.segmented-btn.is-active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: var(--shadow);
}

.send-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 0;
}

/* outbox */
.outbox-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.outbox-row {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 9px;
  background: var(--bg-inset);
  font-size: 12px;
}

.outbox-row .outbox-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.outbox-meta {
  color: var(--muted);
  font-size: 11px;
  margin-top: 3px;
  overflow-wrap: anywhere;
}

/* self card */
.kv-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
}

.kv-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.kv-row dt {
  color: var(--muted);
  flex: none;
}

.kv-row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: right;
}

/* diagnostics */
.diag-dialog {
  width: min(980px, 94vw);
  max-height: 88vh;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  background: var(--bg-card);
  color: var(--text);
  box-shadow: var(--shadow);
}

.diag-dialog::backdrop {
  background: rgba(10, 16, 28, 0.45);
  backdrop-filter: blur(2px);
}

.diag-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.diag-head-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.diag-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 12px;
}

@media (max-width: 760px) {
  .diag-grid {
    grid-template-columns: 1fr;
  }
}

.diag-grid h3 {
  margin: 12px 0 6px;
  font-size: 13px;
}

.diag-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.diag-table th,
.diag-table td {
  text-align: left;
  padding: 4px 6px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  overflow-wrap: anywhere;
}

.diag-table th {
  color: var(--muted);
  font-weight: 600;
  width: 45%;
  font-family: var(--mono);
  font-size: 11px;
}

.diag-table td {
  font-family: var(--mono);
  font-size: 11.5px;
}

.diag-errors {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 260px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 11px;
}

.diag-errors li {
  border-bottom: 1px solid var(--border);
  padding: 3px 0;
  overflow-wrap: anywhere;
  color: var(--text-soft);
}

.diag-errors .err-code {
  color: var(--red);
  font-weight: 700;
}

/* ---------- Round3 M1：拆分指标 / 升级 / echo / 诊断环形缓冲 ---------- */
.conn-detail {
  display: block;
  font-size: 10.5px;
  color: var(--muted);
  margin-top: 2px;
  overflow-wrap: anywhere;
}

.conn-label[title] {
  cursor: help;
  text-decoration: underline dotted color-mix(in srgb, var(--muted) 70%, transparent);
  text-underline-offset: 3px;
}

.upgrade-bar {
  margin-top: 8px;
  align-items: center;
}

.upgrade-bar #status-upgrade[data-phase="verified"],
.upgrade-bar #status-upgrade[data-phase="committed"] {
  color: var(--green);
}

.upgrade-bar #status-upgrade[data-phase="failed"],
.upgrade-bar #status-upgrade[data-phase="not_supported"] {
  color: var(--red);
}

.timeline-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 6px 0 10px;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 8px;
}

.field-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.field-inline select {
  padding: 3px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
}

.echo-result {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  margin: 6px 0 8px;
  background: var(--bg-subtle);
  font-size: 12.5px;
}

.echo-result[data-state="busy"] {
  border-style: dashed;
  color: var(--text-soft);
}

.echo-result[data-state="error"] {
  border-color: color-mix(in srgb, var(--red) 40%, var(--border));
  background: var(--red-soft);
}

.echo-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ack-semantics {
  margin: 0 0 8px;
  line-height: 1.5;
}

.diag-ring {
  display: flex;
  flex-direction: column;
  gap: 3px;
  max-height: 320px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 11px;
}

.ring-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 3px 0;
  border-bottom: 1px solid var(--border);
  overflow-wrap: anywhere;
  color: var(--text-soft);
}

.ring-category {
  flex: 0 0 auto;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--muted);
  font-weight: 700;
}

.ring-category.cat-ws_upgrade,
.ring-category.cat-tls,
.ring-category.cat-dns,
.ring-category.cat-tcp {
  color: var(--amber);
}

.ring-category.cat-upgrade {
  color: var(--green);
}

.ring-code {
  color: var(--primary);
  font-weight: 700;
}

.ring-details {
  flex-basis: 100%;
  opacity: 0.85;
}

.self-test-result {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--bg-subtle);
  font-size: 12.5px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 200px;
  overflow: auto;
}

/* ---------- Round3 M3/M4 feature 面板（flag 门控） ---------- */
.feature-card {
  margin-top: 16px;
}

.feature-flags-note {
  margin: 10px 2px 0;
}

.feature-card .preview-panel {
  margin-top: 8px;
}

.feature-card .preview-panel::after {
  content: '预览假数据（未建立真实文件/P2P 会话）';
  display: block;
  margin-top: 8px;
  font-size: 11px;
  color: var(--muted);
}